I go through about a 24 oz. bottle per hour, alternating sports drink and water. I've been using Heed since it's still palatable when the Heed is ambient temperature (~100 degrees in the summer), but have gone back to Gatorade since I've found at least one flavor that's still palatable when hot - Fruit Punch. OTOH, I can't take the original lemon/lime flavor unless it's ice cold. Gatorade is about 35 cents per 24 oz. bottle when mixed full strength from powder, or about 1/4 the price of Heed.